Is this the right gear to use?
Thread Starter
Member

Joined: Jul 2001
Posts: 121
Likes: 0
From: Sweden
Car: Trans Am -84
Engine: 355, Twin Turbo
Transmission: T5
Axle/Gears: 3.73 open
Is this the right gear to use?
Hello all
I've been searching for a new set of gears since my rearend blew up.
I've got a Camaro -96 rearend with OEM 3.42 gears that's in serious need of replacement.
http://www.tacs.nu/members/m006/breakdown.html
Anyway, I was looking through richmond's site and found two interesting gears.
49-0044-1 : 3.23
49-0045-1 : 3.42
But as far as I have heard, these gears are 7.5" but should fit. I'd like the 7.625" size because it should be stronger, or am I out of line here?
Any input is appreciated, I really need to get my car going with this rearend again.
Regards
Anders
I've been searching for a new set of gears since my rearend blew up.
I've got a Camaro -96 rearend with OEM 3.42 gears that's in serious need of replacement.
http://www.tacs.nu/members/m006/breakdown.html
Anyway, I was looking through richmond's site and found two interesting gears.
49-0044-1 : 3.23
49-0045-1 : 3.42
But as far as I have heard, these gears are 7.5" but should fit. I'd like the 7.625" size because it should be stronger, or am I out of line here?
Any input is appreciated, I really need to get my car going with this rearend again.
Regards
Anders
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
7.5" and 7.625" are the same gears. The actual size is about 7.6", I don't know the exact number, but there is NO DIFFERENCE between the 2. I don't know how that rumor got started, but it needs to stop. The same gears fit all of those rear ends, from when they started using them in 78, up to 2002.
In no case could you put a different size gear on a carrier. That number refers to the inner diameter of the ring, which is a light press fit onto the carrier. But in this case since there is no difference in size, there's ..... no difference in size.
OEM gears are alot easier to install in most cases than the others. The Richmonds are stronger, but they are cut differently to get part of that strength, which is what makes them noisy. OEM gears are fine for most applications.
If you have a 5-speed, use 3.73 (stock for a HO car like mine); if you have a auto trans, go with the 3.42s if your trans is anywhere near stock.
In no case could you put a different size gear on a carrier. That number refers to the inner diameter of the ring, which is a light press fit onto the carrier. But in this case since there is no difference in size, there's ..... no difference in size.
OEM gears are alot easier to install in most cases than the others. The Richmonds are stronger, but they are cut differently to get part of that strength, which is what makes them noisy. OEM gears are fine for most applications.
If you have a 5-speed, use 3.73 (stock for a HO car like mine); if you have a auto trans, go with the 3.42s if your trans is anywhere near stock.
Thread Starter
Member

Joined: Jul 2001
Posts: 121
Likes: 0
From: Sweden
Car: Trans Am -84
Engine: 355, Twin Turbo
Transmission: T5
Axle/Gears: 3.73 open
Thanks, that's good to know.
I've got a T5 B&W but it starts to become a little bit too noisy so it'll be replaced with something else.
I'm building a twin turbo setup for my car but will not drag-race it, but I guess I need to replace the rearend with something beefier lateron. But I'll stick to it untill I get the TT setup finished (sometime next year).
/Anders
I've got a T5 B&W but it starts to become a little bit too noisy so it'll be replaced with something else.
I'm building a twin turbo setup for my car but will not drag-race it, but I guess I need to replace the rearend with something beefier lateron. But I'll stick to it untill I get the TT setup finished (sometime next year).
/Anders
Joined: Sep 2001
Posts: 701
Likes: 2
From: Clinton, IA usa
Car: 1984 Firebird
Engine: 350 Terminator EFI
Transmission: T56
Axle/Gears: 4.10
Originally posted by RB83L69
In no case could you put a different size gear on a carrier. That number refers to the inner diameter of the ring, which is a light press fit onto the carrier. But in this case since there is no difference in size, there's ..... no difference in size.
[/B]
In no case could you put a different size gear on a carrier. That number refers to the inner diameter of the ring, which is a light press fit onto the carrier. But in this case since there is no difference in size, there's ..... no difference in size.
[/B]
actually it is the outer diameter, of the ring gear,
none the less i have gears that are supposed to be 7.625 inch in my 84,
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
No, the number is the inner diameter of the ring gear, which is also the outer diameter of the ring gear's mounting flange on the carrier. The ring gear's outer diameter is actually about 10½ or 11".
Go measure one.
Go measure one.
Last edited by RB83L69; Jul 18, 2002 at 09:40 AM.
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